In this study, without introducing any chemical cross-linking agent, a high-strength and stretchable gelatin-based conductive hydrogel was prepared by simple and efficient physical blending using the unique triple-helical cross-linking structure of gel and the hydrogel physical cross-linking network formed by the hydrogen bonding between MFC and gel molecules. Fourier-transform infrared (FT-IR) was carried out to investigate interactions between MFC and gel, demonstrating that the hydrogel dimensional stability is mainly due to a mass of hydrogen bonds, which is formed by the polar groups (-OH...
